commit c57f2c39f4ff09dd2128cb46614d9c48451b248e
author Kevin DuBois <kevindubois@google.com> Fri Dec 20 16:32:29 2019 -0800
committer Kevin DuBois <kevindubois@google.com> Fri Jan 31 16:21:53 2020 -0800
tree 95e4e5512a10ed7ff2f16387e2866e901572116b
parent 69298c18f21e3460d3b9f032a878a8fa22540517

SF: enable VSyncReactor

Enable VSyncReactor timing system. This is a vsync timing system
intended to work with VRR, multiple fixed rates, and typical fixed  rate
devices.

System can be disabled with
setprop debug.sf.vsync_reactor 0; stop; start

Test: go/dispsync2-checks
Fixes: 140302863

Change-Id: I46bb8d55604136cc0eb8b249e465d6ae5470c3f3

services/surfaceflinger/Scheduler/VSyncPredictor.cpp

diff --git a/services/surfaceflinger/Scheduler/VSyncPredictor.cpp b/services/surfaceflinger/Scheduler/VSyncPredictor.cpp
index e688415..b467f24 100644
--- a/services/surfaceflinger/Scheduler/VSyncPredictor.cpp
+++ b/services/surfaceflinger/Scheduler/VSyncPredictor.cpp
@@ -38,7 +38,7 @@
 
 VSyncPredictor::VSyncPredictor(nsecs_t idealPeriod, size_t historySize,
                                size_t minimumSamplesForPrediction, uint32_t outlierTolerancePercent)
-      : mTraceOn(property_get_bool("debug.sf.vsp_trace", false)),
+      : mTraceOn(property_get_bool("debug.sf.vsp_trace", true)),
         kHistorySize(historySize),
         kMinimumSamplesForPrediction(minimumSamplesForPrediction),
         kOutlierTolerancePercent(std::min(outlierTolerancePercent, kMaxPercent)),